Atmospheric Chemistry and Physics Discussions
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10.5194/acpd-7-2169-2007
http://www.atmos-chem-phys-discuss.net/7/2169/2007/
http://www.atmos-chem-phys-discuss.net/7/2169/2007/acpd-7-2169-2007.html
http://www.atmos-chem-phys-discuss.net/7/2169/2007/acpd-7-2169-2007.pdf
2169
2196
2007-02-15
A semi-analytical method for calculating rates of new sulfate aerosol formation from the gas phase
J. Kazil
jan.kazil@noaa.gov
E. R. Lovejoy
NOAA Earth System Research Laboratory, Boulder, CO, USA
National Research Council Associateship Program, Washington, D.C., USA
The formation of new sulfate aerosol from the gas phase is commonly represented
in atmospheric modeling with parameterizations of the steady state nucleation
rate. Such parameterizations are based on classical nucleation theory or on aerosol
nucleation rate tables, calculated with a numerical aerosol model.
These parameterizations reproduce aerosol nucleation rates calculated with a
numerical aerosol model only imprecisely. Additional errors can arise when the nucleation rate is used as a surrogate for
the production rate of particles of a given size. We discuss these errors and present a method which allows a more precise
calculation of steady state sulfate aerosol formation rates. The method is based on the semi-analytical solution of an aerosol system in
steady state and on parameterized rate coefficients for H<sub>2</sub>SO<sub>4</sub> uptake
and loss by sulfate aerosol particles, calculated from laboratory and theoretical
thermodynamic data.
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